Question: Question 17 2 Pts Skeletal Muscle Cells Contain An Organelle Called The Sarcoplasmic Reticulum, Which Is A Membrane (lipid Bilayer) Bound Container That Stores Large Amounts Of Calcium Inside Until Some Of The Calcium Moves Out To Initiate Muscle Contraction. From This Information You Can Reason That: The Membrane That Surrounds The Sarcoplasmic Reticulum …

Question 17 2 pts Skeletal muscle cells contain an organelle called the sarcoplasmic reticulum, which is a membrane (lipid bilayer) bound container that stores large amounts of calcium inside until some of the calcium moves out to initiate muscle contraction. From this information you can reason that: The membrane that surrounds the sarcoplasmic reticulum does not allow calcium to pass through on its own The membrane must have carrier proteins for calcium that allow the calcium to move via facilitated diffusion The solution of calcium in the sarcoplasmic reticulum is hypotonic relative to the intracellular fluid If a disease caused holes to appear in the skeletal muscle cell membrane and also the membrane of the sarcoplasmic reticulum, large amounts of calcium would enter the extracellular fluid by simple diffusion Question 25 2 pts Which of the following should occur during fracture repair but not during normal growth in length? Cytokines recruiting stem cells to form a callus Increased numbers of chondrocytes Activation of osteoblasts to increase osteoid production Production of new blood vessels to move into tunnels bored by osteoclasts Endochondral ossification Hematoma and pain